Intel Xeon E3-1240 v5 socket: LGA 1151
The Intel Xeon E3-1240 v5 uses the LGA 1151 socket on C236 workstation boards. It is a 4 core Skylake-DT part with 8 threads from 3.5 GHz to 3.9 GHz at 80 W with no integrated graphics.
- Socket
- LGA 1151
- Launched
- October 2015
- Cores and threads
- 4 and 8
- Base power
- 80 W
- Codename
- Skylake-DT
- Segment
- Workstation
- Family
- Intel Xeon E3
- Clocks
- 3.5 / 3.9 GHz
Intel Xeon E3-1240 v5 specifications
| Cores | 4 |
|---|---|
| Threads | 8 |
| Core architecture | Skylake cores on 14 nm |
| Clocks | 3.5 GHz base, up to 3.9 GHz turbo |
| Cache | 8 MB Smart Cache |
| Processor base power (TDP) | 80 W |
| Manufacturing process | 14 nm |
| Memory support | DDR4-1866 and 2133 and DDR3L ECC, two channels, up to 64 GB |
| PCI Express | PCIe 3.0, 16 lanes |
| Integrated graphics | None |
| ECC memory | Supported |
| Package | LGA 1151 (FCLGA1151) |
Motherboard and chipset compatibility
Intel Xeon E3-1240 v5 needs a motherboard with a LGA 1151 socket. The table shows which chipset series accept it.
| Series | Chipsets | Support |
|---|---|---|
| C230 series: C236 | C236 | Works out of the box |
Board makers publish a CPU support list for every model. Check it for your exact board before buying. Chipset details for LGA 1151.
LGA 1151 at a glance
| Type | LGA, 1,151 contacts |
|---|---|
| Package size | 37.5 × 37.5 mm |
| Introduced | August 2015 |
| Memory | DDR4 on most boards (some early boards use DDR3L). DDR4 only on the second revision |
| Cooler mounting holes | 75 × 75 mm |
What the Xeon E3-1240 v5 is
The Xeon E3-1240 v5 is a headless Skylake workstation part on LGA 1151 for single socket servers. Intel set 4 cores and 8 threads at 3.5 GHz base with turbo to 3.9 GHz. Eight megabytes of Smart Cache cover builds. Power is 80 W on 14 nm from October 2015. No integrated graphics exist.
High base clocks without display silicon suit virtualization hosts with BMC graphics. Turbo matches desktop bursts with ECC protection. Eight threads handle tenants beside services. The 80 W envelope fits rack workstations with discrete management.
DDR4 and DDR3L ECC over two channels to 64 GB feed the node. ECC guards host memory. Buyers pick the 1240 v5 where headless speed with ECC must fit C236 below flagship cost.
Socket and motherboard compatibility
The 1240 v5 fits LGA 1151 on C236 workstation boards. The socket C236 table covers Skylake-DT. Consumer firmware lacks E3 support. A discrete or BMC card covers setup displays.
ECC UDIMMs to 64 GB populate two channels. LGA 1150 never accepts Skylake. Verify 80 W support in compact chassis.
Memory, PCIe and cooling
DDR4-1866 and 2133 ECC over two channels to 64 GB suit single socket hosts. DDR3L ECC options exist for reuse. Even DIMM fills protect bandwidth.
PCIe 3.0 with 16 lanes from the CPU serves NICs and NVMe. Headless hosts use lanes for I/O rather than graphics. A fast NIC suits cluster traffic.
Cooling uses 80 W rack or tower sinks. Sustained all core turbo needs airflow. No boxed cooler ships.
Upgrade paths
On the same socket the Intel Xeon E3-1230 v5 at 3.4 GHz base below saves cost with the same 80 W tuning, while the Intel Xeon E3-1270 v5 at 3.6 GHz base above adds speed. All share C236 boards where listed.
A move to E3 v6 needs Kaby Lake-DT firmware. The 1240 v5 covers upper headless value in Skylake workstations.
Frequently asked questions
What socket does the Intel Xeon E3-1240 v5 use?
It uses LGA 1151 on C236 workstation boards.
How many cores does the Xeon E3-1240 v5 have?
4 cores and 8 threads at 3.5 GHz base with turbo to 3.9 GHz.
Which graphics does the Xeon E3-1240 v5 include?
None. It needs discrete or BMC graphics.
When did the Xeon E3-1240 v5 launch?
October 2015.
Sources and verification
- Intel Xeon Processor E3-1240 v5 specifications (Intel)
- Intel Xeon E3-1268L v5 Specs (TechPowerUp, Skylake-DT family data)
Facts last checked against these sources on . Page last edited on .